Level density and mechanism of deuteron-induced reactions on<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mtext>Fe</mml:mtext><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>54</mml:mn><mml:mo>,</mml:mo><mml:mn>56</mml:mn><mml:mo>,</mml:mo><mml:mn>58</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>

Ramirez, A. P. D.; Voinov, A.; Grimes, S. M.; Byun, Y.; Brune, C. R.; Massey, T. N.; Akhtar, Shamim; Dhakal, Sushil; Parker, Cody

doi:10.1103/physrevc.92.014303

Cited by 11 publications

(12 citation statements)

References 30 publications

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“…Typical arm lengths are between one and two meters, depending on the required time-offlight resolution (where the present detector timing resolution is ~90ns) and outgoing particle energy for a given angle. The arm ports are mounted at angles ranging from 22.5° to 157.5°, where the measured angles for a particular experiment depend on the details of the reaction being investigated (Voinov et al (2007), Ramirez et al (2015)). The charged-particle time-of-flight spectrometer has primarily been used to measure charged-particle evaporation spectra for studies of compound nuclear reactions.…”

Section: Charged-particle Time-of-flight Spectrometermentioning

confidence: 99%

“…Comparison between measured yields and theoretical calculations have shed light on the reaction mechanism for charged-particle reactions and provided critical input to theoretical reaction rate calculations. Notable results include a host of level density determinations, which were obtained by comparison of experimental data to Hauser-Feshbach calculations (Voinov et al (2007), Ramirez et al (2015)), and assessments of the extent to which the compound and direct nuclear reaction mechanisms contribute to particular reaction cross sections (Al-Quraishi et al (2000)). Kang (2002).…”

Section: Charged-particle Time-of-flight Spectrometermentioning

confidence: 99%

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The Edwards Accelerator Laboratory at Ohio University

et al. 2017

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The Edwards Accelerator Laboratory at Ohio University is the hub for a vibrant program in low energy nuclear physics. Research performed with the lab's 4.5MV tandem accelerator spans a variety of topics, including nuclear astrophysics, nuclear structure, nuclear energy, homeland security, and materials science. The Edwards Lab hosts a variety of capabilities, including unique features such as the beam swinger with neutron time-of-flight tunnel and the integrated condensed matter physics facility, enabling experiments to be performed with low-to-medium mass stable ion beams using charged-particle, gamma, and neutron spectroscopy. This article provides an overview of the current and near-future research program in low energy nuclear physics at Ohio University, including a brief discussion of the present and planned technical capabilities.Comment: To appear in Physics Procedia issue on the The 24th International Conference on the Application of Accelerators in Research and Industry - CAARI 2016. This article corresponds to abstract #12

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Section: Charged-particle Time-of-flight Spectrometermentioning

confidence: 99%

Section: Charged-particle Time-of-flight Spectrometermentioning

confidence: 99%

The Edwards Accelerator Laboratory at Ohio University

et al. 2017

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“…Therefore, it is very important to acquire the experimental level density at low as well as high excitation energy E * and spin J using different techniques. The particle evaporation technique is another approach to estimate the level density below as well as above the particle threshold energy [19][20][21][22][23]. The validity of the particle evaporation technique has been checked in Ref.…”

mentioning

confidence: 99%

“…The potential problem with the particle evaporation technique is that multistep and direct reactions may contribute. Recently, low-energy light-ion beams (d, α) have been used to extract the NLD from a particular channel and the contribution from direct reaction has been ruled out by measuring the particle spectra at backward angles and the angular distributions of the particles [19][20][21][22][23]28].…”

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confidence: 99%

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Nuclear level density of $^{69}$Zn from gamma gated particle spectrum and its implication on $^{68}$Zn(n, $γ$)$^{69}$Zn capture cross-section

Santra,

Dey,

Roy

et al. 2020

Preprint

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Evaporated α-spectra have been measured in coincidence with low energy discrete γ-rays from residual nucleus 68 Zn populated in the reaction 64 Ni( 9 Be,αn) 68 Zn at E( 9 Be) = 30 MeV producing 73 Ge compound nucleus. Low energy γ-gated α-particle spectra, for the first time, have been used to extract the nuclear level density (NLD) for the intermediate 69 Zn nucleus in the excitation energy range of E ≈ 5-20 MeV. The slope of NLD as a function of excitation energy for 69 Zn matches nicely with the slope determined from RIPL estimates for NLD at low energies and the NLD from neutron resonance data. Extracted inverse NLD parameter (k = A/ a) has been used to determine the nuclear level density parameter value a at neutron separation energy S n for 69 Zn. Total cross section of 68 Zn(n,γ) capture reaction as a function of neutron energy is then estimated employing the derived a(S n ) in the reaction code TALYS. It is found that the estimated neutron capture cross section agrees well with the available experimental data without any normalization. The present result indicates that experimentally derived nuclear level density parameter can constrain the statistical model description of astrophysical capture cross section and optimize the uncertainties associated with astrophysical reaction rate.

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Calculation of microscopic nuclear level densities based on covariant density functional theory

Geng,

Du,

et al. 2023

NUCL SCI TECH

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A microscopic method for calculating nuclear level density (NLD) based on the covariant density functional theory (CDFT) is developed. The particle-hole state density is calculated by combinatorial method using the single-particle levels schemes obtained from the CDFT, and then the level densities are obtained by taking into account collective effects such as vibration and rotation. Our results are compared with those from other NLD models, including phenomenological, microstatistical and non-relativistic HFB combinatorial models. The comparison suggests that the general trends among these models are basically the same, except for some deviations from different NLD models. In addition, the NLDs of the CDFT combinatorial method with normalization are compared with experimental data, including the observed cumulative number of levels at low excitation energy and the measured NLDs. Compared with the existing experimental data, the CDFT combinatorial method can give reasonable results.

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Level density and mechanism of deuteron-induced reactions onFe54,56,58

Cited by 11 publications

References 30 publications

The Edwards Accelerator Laboratory at Ohio University

The Edwards Accelerator Laboratory at Ohio University

Nuclear level density of $^{69}$Zn from gamma gated particle spectrum and its implication on $^{68}$Zn(n, $γ$)$^{69}$Zn capture cross-section

Calculation of microscopic nuclear level densities based on covariant density functional theory

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